Biology

An average nucleosome contains about:

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About how many times is a DNA molecule wrapped around a single histone octamer?

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Which of the following viruses has a multipartite genome?

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Telomerase extends telomere sequences by using:

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Matrix attachment regions (MARS) are DNA sequences that attach to the nuclear matrix and are characterized by:

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Insertion of the viral genome into a phage head involves:

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Giemsa staining of eukaryotic chromosomes allows visualization of dense bands with less dense ...

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For spherical capsids of DNA viruses such as lambda phage, assembly occurs:

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Centromeric regions in chromosomes contain:

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Bacterial nucleoids each contain about:

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True or False? The pair of major rRNAs is transcribed as a single precursor unit in both bacteria ...

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True or False? Satellites represent very short stretches of DNA of very low sequence complexity.

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Which of the following show the highest number of multiple identical gene copies in eukaryotes?

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The crossover fixation model predicts that:

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Simple sequence DNA consists of:

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Sequence elements that are about 10100 bp in size and are present in about 550 repeats in a ...

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Ribosomal RNA gene clusters in eukaryotes show:

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Deletion of half of the rDNA cluster in X. laevis or D. melanogaster results in:

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True or False? Neutral mutations in amino acid sequence accrue as the result of random drift and fixation.

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True or False? Low heterozygosity of a gene may indicate recent selective events.

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True or False? A processed pseudogene originates by insertion at a specific site of an RNA-derived product.

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Two or more identical copies of the same gene present on the same chromosome are called:

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The most common type of gene duplication generates:

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Sometimes neutral variants that are linked to a gene undergoing selection also become fixed. This is called:

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Genes that have become nonfunctional and are no longer able to be transcribed to a functional ...

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